Audit-Ready and
In Control

Providing reliable and cost-effective accredited calibration to Los Angeles County, Ventura County, Santa Barbara County and Santa Clarita County since 1992.

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ISO/IEC 17025 Accredited

At QSI we take calibration seriously—that’s why we're ISO/IEC 17025 accredited. This accreditation demonstrates our commitment to precision measurement, rigorous quality control, and industry-leading expertise. 

View Our Accreditation

Our Calibration Services
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Dimensional Calibration

Plates, Gages, Micrometers, Calipers, Crimpers, Hardness Testers, Optical Comparators, Thread Rings [more]

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Electrical Calibration

Power Meters, Power Amplifiers, Oscilloscope Probes, Voltmeters, Ammeters, AC/DC Hipot  [more]

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Force Calibration

Tension Meters, Dynomometers, Force Gages, Hanging Scales, Load Cells, Strain Gages, Wire Pull Testers [more]

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Mass Calibration

Scales, Balances, Weights, Car Scales, Pipettes [more]

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Pressure Calibration

Differential Pressure, Pressure Gages, Pressure Transducers, Vacuum Gages, Barometers [more]

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RF & Microwave Calibration

Power Meters, Probes, Spectrum Analyzers, Signal Generators, Oscilloscopes, Power Sensors, RF Counters, Filters [more]

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Temperature Calibration

Environmental Chambers, Ovens, Freezers, Thermometers, Thermocouples, Hygrothermographs, Conductivity Meters [more]

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Time Calibration

Frequency Counters, Microwave Counters, Linear Counters, Single Accelerometers, Triax Accelerometers [more]

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Torque Calibration

Torque Wrenches, Torque Watches, Torque Drivers, Torque Analyzers [more]

Why Choose QSI?

At Quality Surveillance, Inc. we combine the personalized service of a local provider with the resources and reliability of a national network. 

Powered By Accredited Labs

As part of the Accredited Labs family, we bring you industry-leading calibration services backed by ISO/IEC 17025 accreditation, advanced technology, and a commitment to precision.

Customer-Centered Service

We prioritize clear communication, consistency, and reliability—ensuring your equipment is calibrated accurately, on time, and with minimal disruption to your operations.

Tailored Solutions for Your Industry

Our expert team takes the time to understand your unique calibration needs, providing customized support to keep you compliant and performing at your best.

Industries We Serve
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Automotive

The automotive industry operates at the intersection of precision manufacturing, safety engineering, and technological innovation. 

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Construction Materials and Machinery

The construction industry builds the foundation of modern society, creating infrastructure, buildings, and structures that must withstand decades of use.

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Engineering and R&D

Engineering and research & development organizations drive technological innovation, scientific advancement, and breakthrough discoveries that shape our future.

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General Manufacturing

Manufacturing represents the transformation of ideas into reality, where precise measurement determinse the difference between profit and waste.

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Medical and Healthcare

In the healthcare industry calibration directly impacts patient safety, treatment effectiveness, and clinical outcomes.

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Pharmaceuticals and Life Sciences

Pharmaceuticals and life sciences carry the ultimate responsibility for products that directly impact human health.

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Public Administration and Government

Public administration and government agencies carry the fundamental responsibility of serving citizens and protecting public health and safety.

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Semiconductors and Electronics

Semiconductor operations require the highest levels of measurement accuracy and system reliability.

Audit-Ready Calibration in 3 Simple Steps
1

Submit Your Equipment List

Send us a list of the equipment you need calibrated, and we’ll provide a tailored quote with clear pricing—no hidden fees.
2

Schedule Your Calibration

Choose a convenient time for a mobile or on-site equipment calibration. Our certified technicians ensure precision and compliance with ISO/IEC 17025 standards.
3

Stay Compliant & Audit-Ready

Receive detailed calibration reports and certification, giving you peace of mind for audits and operational excellence.